RESIDUE   ZTK     14
CONECT      N      3 CA   H    H2  
CONECT      CA     4 N    C    CB   HA  
CONECT      C      3 CA   O    OXT 
CONECT      O      1 C   
CONECT      CB     4 CA   CG   HB2  HB3 
CONECT      CG     2 CB   ND2 
CONECT      ND2    1 CG  
CONECT      OXT    2 C    HXT 
CONECT      H      1 N   
CONECT      H2     1 N   
CONECT      HA     1 CA  
CONECT      HB2    1 CB  
CONECT      HB3    1 CB  
CONECT      HXT    1 OXT 
END   
HET    ZTK             14
HETNAM     ZTK (2S)-2-amino-3-cyanopropanoic acid
FORMUL      ZTK    C4 H6 N2 O2